HEF4938B View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
HEF4938B Datasheet PDF : 8 Pages
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Philips Semiconductors
Dual precision monostable multivibrator
Preliminary specification
HEF4938B
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
Change in output O
pulse width over
temperature (Tamb)
Change in output O
pulse width over
VDD range 5 to 15 V
Pulse width variation
between circuits
in same package
External timing
resistor
External timing
capacitor
Input capacitance
(pin 2 or 14)
VDD
V
SYMBOL MIN. TYP.
MAX.
5
± 0,2
%
10 ∆tWO
15
± 0,2
%
± 0,2
%
∆tWO
± 1,5
%
5
10 ∆tWO
15
±1
%
±1
%
Rt = 100 kΩ
Ct = 2 nF to 10 µF
±1
%
Rt
5
−
(1)
kΩ
Ct
2000 −
no limits pF
CIN
15
pF
Note
1. The maximum permissible resistance Rt, which holds the specified accuracy of tWO, depends on the leakage current
of the capacitor Ct and the leakage of the HEF4538B.
January 1995
6
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